Taps with flame failure device

In the versions with a flame failure device, once the control spindle has been pushed down completely, and a few seconds after the burner has ignited, the thermocouple generates current sufficient to activate the electromagnet, allowing in this way the flow of the gas. At this point, the control spindle of the valve can be released.

If the flame accidentally goes out, the thermocouple cools down with a consequent reduction of the current which causes, after a few seconds, the electromagnet to close, thus interrupting the flow of the gas.